As long as the sample has the same number of atoms for both elements, the mass ratio is independent of the sample size.
The arithmetic mean is calculated by adding a set of numbers, dividing by their count, and then taking the result. The molecular masses of different substances vary. Therefore, variable numbers of atoms, molecules, or moles exist in masses of equal mass. On the other hand, equal quantities of moles of different substances have different masses. The result will be disproportionately impacted by the one data point if you attempt to calculate an "average of averages". In essence, the value of the average of 10,000 data points is the same as that of the average of a single data point.
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In Niels Bohr's model of the atom, electrons move like _____ orbiting the _____.
Answer:
protons and neutrons
Explanation:
because Neil bohr had described this is his theory
Answer:
hope this help
Explanation:
In Bohr's model, electrons moved around the atomic nucleus in circular orbits, but those orbits had set discrete energies, and electrons could gain or lose energy only by moving from one orbit to another, absorbing or emitting radiation as necessary.
Element Arrangement Quick Check
Why is it impossible for an element to have an atomic number of 110.5? (1 point)
A)Atoms with atomic numbers greater than 100 are unstable.
B)Exactly half of the isotopes would need an atomic number of 110, and half would need an atomic number of 111, which is very unlikely.
C)Atoms of an element all have the same whole number of protons.
D)Atoms of an element all have the same whole number of protons and neutrons.
It is impossible for an element to have an atomic number of 110.5 because atoms of an element all have the same whole number of protons. Thus, option C is correct.
What is an atomic number of an element?The atomic number is the number of protons in the nucleus of an atom. The number of protons defines the identity of an element. The atomic number of an atom is equal to the number of protons in the nucleus of an atom or the number of electrons in an electrically neutral atom.
For example, in a sodium atom, there are 11 electrons and 11 protons.
Thus, the atomic number of Na atom = number of electrons = number of protons is equal to 11.
The atomic number is based only on the number of protons in the nucleus of an atom. Since this is a count of whole numbers, it cannot be a decimal. It's either element 110 or 111, not 110.5.
There is no half proton in the atom, hence we can not have an atomic number of 110.5.
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Enter the molecular equation representing aqueous acetic acid neutralized by aqueous barium hydroxide. express your answer as a balanced molecular equation. identify all of the phases in your answer.
The molecular equation representing aqueous acetic acid neutralized by aqueous barium hydroxide:
2CH₃COOH(aq) + Ba(OH)₂(aq) → (CH₃COO)₂Ba(aq) + 2H₂O(l).
CH₃COOH is acetic acid
Ba(OH)₂ is barium hydroxide
(CH₃COO)₂Ba is barium acetate
H₂O is water
Acetic acid is an acid and barium hydroxide is a base. They form salt and water and neutralization reaction takes place.
Neutralization is is reaction in which an acid (in this example acetic acid CH₃COOH) and a base (in this example barium hydroxide) react quantitatively with each other.
Reactants and products are present in undissociated form in molecular equations.
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Determine the empirical formula of a compound containing 48.38 grams of carbon, 6.74 grams of hydrogen, and 53.5 grams of oxygen.
in an experiment, the molar mass of the compound was determined to be 180.15 g/mol. what is the molecular formula of the compound?
do not send links as an answer
Answer:
First, I will convert from grams to moles. This will give me approximately 4.032 moles of carbon, 6.740 moles of hydrogen, and 3.344 moles of oxygen. Then, I will calculate the mole ratio, using whole numbers. I must also identify the least amount of moles in an element for this step, which is oxygen at 3.344 moles.
Oxygen = 3.344/3.344 = 1
Carbon = 4.032/3.344 = 1
Hydrogen = 6.740/3.344 = 2
The empirical formula will be COH2.
Now that we have the molar mass of the molecular formula, we can calculate for the molecular formula. First, we will begin by discovering the molar mass of the empirical formula, which will be C molar mass x 1 + O molar mass x 1 + H molar mass x 2. That will be equal to 60.949. After that, we can divide the molecular mass by the empirical formula molar mass, giving us approximately 3. Now we will multiply the empirical formula by 3, giving us our molecular formula, which will be equal to C3O3H6.
5. Kinetic and potential energy both relate to:
a. Heat
b. Light
c. Motion
Answer:
C. Motion
Explanation:
Potential energy is the energy stored within an object.
Kinetic energy is the energy an object posesses due to its motion.
Aspartate has three ionizable groups with pka values of 1.88, 9.60, and 3.65. what is the average net charge of aspartate at ph 3.65?
Aspartate has three ionizable groups with pka values of 1.88, 9.60, and 3.65. The average net charge of aspartate at ph 3.65 is - 0.5.
What Is Aspartate Amino Acid?Aspartate, like glutamic acid and glutamate, is the anion of aspartic acid. Aspartic acid is a -amino acid with a net negative charge. It is the most well-known form of amino acid that occurs in physiological conditions of the body.
Relation between Asparagine and aspartic acid. Asparagine's amide group is easily hydrolyzed to amino and carboxyl groups to form aspartic acid. This transformation is linked to the molecular basis of ageing. It is found on the surface as well as inside proteins due to the ability of the amide group of molecules to form hydrogen bonds.Asparagine is a derivative of aspartic acid, as we can see. In the carbon distal to the carbon, asparagine has an amide functional group. Aspartic acid has a carboxyl group in its acidic form.Asparagine's side chain has no electric charge, making it polar.The fundamental and primary distinction is that aspartic acid has a C4 carbon, whereas Asparagine has an amide group.Because asparagine residues can be changed to form complex carbohydrate chains, they are important. It can also form a cycle within a peptide or protein to produce an amide, which then opens to produce aspartic acid.Asparagine's main function as a -amino acid is that it can be used in the biosynthesis of proteins, whereas Aspartic Acid, due to its overall negative charge, plays an important role in the synthesis of other amino acids.Aspartic acid is also involved in the synthesis of citric acid and the urea cycle.Learn more about Aspartic acid here:-
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If the acid A has a pKa of 5 compared acid B with Pka of 9,how much stronger is acid A over B
Acid A is 10^4 = 10000 times stronger than B. This istrue if acid A has a pKa of 5 compared acid B with Pka of 9.
Acid strength is quantified by the acid dissociation constant (Ka). The acid is more potent the higher the value. A higher pka indicates lower acidity. Therefore, a weaker acid results from a greater pKa and a smaller Ka. A weaker acid is one with a higher pKa.
Since pKa = -log10(Ka), an acid is 10 times stronger for each pKa value of 1 below another. Acid A is therefore 10^4 = 10000 times stronger than acid B.
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Under certain conditions, excessive ____________ results in water depletion, which is called ____________ . a sign of water depletion is ____________ .
Under certain conditions, excessive Sweating results in water depletion, which is called Dehydration. A sign of water depletion is Weight Loss.
Dehydration means less intake of fluid such as water, juices etc or by losing more fluid than the amount of fluid you have taken. Fluid can be lost in the form of sweat, tears, urine, vomiting, or diarrhoea.
A dehydration reaction can be defined as the chemical reaction between any two compounds where one of the products is water. Dry mouth and tongue, no tears when crying, Sunken eyes and cheeks are some of the signs of dehydration.
Under certain conditions, excessive Sweating results in water depletion, which is called Dehydration. A sign of water depletion is Weight Loss.
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The revival of jansenism, which centered on miracles that allegedly happened at the grave of a jansenist priest, is evidence of what development within french catholicism?
The evidence of the revival of Jansenism is the desire of ordinary people to connect themselves to what they saw as the direct work of God.
What is Jansenism?Jansenism is a theological movement that is done with the mixing of Catholicism. It was active in France's kingdom.
Primarily throughout the seventeenth and eighteenth centuries, Jansenism flourished inside Roman Catholicism before being denounced as heresy in 1653 by Pope Innocent X.
Thus, the yearning of common people to participate in what they perceived as God's direct action is proof of the rebirth of Jansenism.
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What multiplicities are observed for the signals in the off-resonance decoupled 13c nmr spectrum of (2e)-3-chloroacrylaldehyde?
A singlet, a triplet, and a quartet multiplicities are observed for the signals in the off-resonance decoupled 13c NMR spectrum of (2e)-3-chloroacrylaldehyde
A spectrum is defined as the characteristic wavelengths of electromagnetic radiation (or parts thereof) emitted or absorbed by an object or substance, atoms or molecules. Multiple: Spectrum. A spectral line is an otherwise smooth and continuous spectral dark or bright line resulting from the emission or absorption of light in a narrow frequency range compared to adjacent frequencies.
These applications include Voice of America broadcasting, weather services, radar and voice communication systems for controlling commercial and civil air and sea traffic, weather satellite systems, flood warning and water control systems, and time signals.
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In the absence of stability information water containing formulations (prepared from ingredients in solid form) should be assigned by a beyond-use date that is:______.
In the absence of stability information water containing formulations (prepared from ingredients in solid form) should be assigned by a beyond-use date that is: no later than 14 days when stored at cold temperature.
When to use beyond-use dates when preparing suspension?
When using manufactured solid dosage forms to prepare a solution or aqueous suspension, the compound is additionally to consider factors such as hydrolysis and the freeze-thaw property of the final preparation before assigning a beyond-use date.
What is solution and suspension?
While suspensions are heterogeneous mixtures, solutions are homogeneous mixtures. The particles of a suspension may be seen with the open eye, whereas the particles of an answer are at the ion or molecular level and cannot be seen with it.
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Select all of the correct ways to complete this statement: when atoms combine to form compounds, they can ________ electrons.
The correct way to complete this statement: when atoms combine to form compounds, they can share electrons.
An atom is a particle of matter that uniquely defines a chemical element. Atoms consist of a central nucleus surrounded by one or more negatively charged electrons. The nucleus is positively charged and contains one or more relatively heavy particles known as protons and neutrons.
Atoms formed shortly after the "Big Bang" billions of years ago. Atoms are made up of electrons that revolve around a nucleus containing protons and neutrons. The big bang created elementary particles such as electrons, protons, and neutrons. Things slowed down as the universe continued to expand and cool. It took 380,000 years for electrons to confine themselves in orbits around the nucleus to form the first atom. These are mainly helium and hydrogen, which are still the most common elements in the universe.
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Does the water testing protocol described in the lab manual involve serial dilution? justify your answer
Adding different amounts of contaminated water to each tube rather than diluting between tubes. Frequently, county health agencies will assist you with nitrate or bacteria testing. If not, you can ask a state-approved laboratory to test your water. Call the Safe Drinking Water Hotline at 800-426-4791 to locate one in your region.
Tests of the water's quality will reveal information on the condition of the river. The quality of the water might fluctuate over time, and this can be noticed by testing tubes it repeatedly. Temperature, pH, turbidity, salinity, nitrates, and phosphates are just a few of the variables that can be measured.
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Which could represent the reaction mixture after the complete combustion of acetaldehyde, ch3cho?
The term that represents the reaction mixture after the complete combustion of acetaldehyde, ch3cho is H-O-H, O-C-O. The correct option is b.
What is complete combustion?Complete combustion is the process of consuming all oxygen in the reaction. In the process of combustion, oxygen is needed for the process. In incomplete combustion, oxygen is not present in the reaction.
In incomplete combustion, less energy is produced because of less oxygen in the reaction.
The inorganic substance that is showing the complete combustion process is H-O-H, O-C-O.
Thus, the correct option is b. H-O-H, O-C-O.
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The question is incomplete. Your most probably complete question is given below:
a. C-O; O-H, O-C
b. H-O-H, O-C-O
c. H-C-C-C-H
d. C-O, O-C, H-H
e. O-C-H, H-H-H
4. Which of the following careers requires the study of chemistry? (Choose all that apply)
1. Pharmacist
2. Doctor
3. Nurse
4. Science teacher
The ratio of the mass in grams of fluorine to the mass in grams of iodine in the three compounds is:_______
The ratio of the mass in grams of fluorine to the mass in grams of iodine in the three compounds is 13.49
Fluorine mass in grams is 134.9 g and iodine mass in grams is 10.0 g so here the ratio of this two in the three compound is 134.9/10.0=13.49
The mass of ratio of florine and iodine is 13.49
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Describe how plants promote mechanical and chemical weathering but inhibit erosion
Plants promote mechanical and chemical weathering but inhibit erosion because of root
Plants can cause mechanical weathering their roots grow into rocks and crack them and when plants cause chemical weathering there roots release acid or other chemicals, onto rocks, which then forms cracks, and breaks apart. as plant roots take in nutrients, they remove elements from the minerals. This causes a chemical change in the rock but inhibit erosion because plants break up earthen materials as they take root, and can create cracks and crevices in rocks that's why they inhibit erosion
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If you have purchased used machinery and it does not come with maintenance instructions, you should __________.
If you have purchased used machinery and it does not come with maintenance instructions, you should contact the manufacturer or check their website.
New machinery always come with maintenance instructions.
With an used machinery that is not always a case.
Machinery manufacturer is the best place to get help for some issues.
The manufacturer can provide necessary informations about maintenance instructions and other important informations about their products.
Another place to find necessary informations is website of the manufacturer of the used machinery. Website usually have many others usefull informations about the product. Many manufacturer optimize their information pages.
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How many residues separate amino acids that are stabilized by hydrogen bonds in α helices?.
The number of residues separated amino acids that are stabilized by hydrogen bond in α helices is 3.6 amino acids residue.
When the two or more amino acid combine to form a peptide and the water is removed then the remain of each amino acid is called amino - acids residue.
The amino group of one amino acid interacts with carboxyl group of other amino acid to form peptide bond.
The α helix is stabilized by hydrogen bonds between the carbonyl oxygen and amino group of every third residue in the helical turn and with each helical turn consists 3.6 amino group.
Thus, alpha - helices have 3.6 amino acids residue per turn. This means that helix 36 amino acids long form 10 turns.
Therefore, number of residues separated amino acids that are stabilized by hydrogen bond in α helices is 3.6 amino acids residue.
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What are the base units for distance, mass, time and volume in the metric system? What are
some units for these in the Standard English System?
Answer:
Explanation:
All of the following are duties of United States citizens EXCEPT:
A.
understanding their rights
B.
taking education seriously
C.
understanding what it means to be an active citizen
D.
learning about and understanding foreign governments and laws
Please select the best answer from the choices provided
A
B
C
D
Answer:
The kilogram, meter, and second are the fundamental base units upon which the metric system is built, but seven units of measure are defined from which all the other units are derived: Kilogram: The kilogram (kg) is the base unit of mass. Meter or Metre: The meter (m) is the unit of length or distance.
Explanation:
The two main sets of English units were the Winchester Units, used from 1495 to 1587, as affirmed by King Henry VII, and the Exchequer Standards, in use from 1588 to 1825, as defined by Queen Elizabeth I.
PLEASE HELP!!!!!!!!!!! I'VE BEEN STUCK ON THIS FOR 45 MINUTES
A runner exerting a running force of 325 N to the right is met with an air resistance force of 45 N to the left. What is the net force of the runner?
The required force is 280 N.
We must subtract our individual forces in order to calculate the net force.
In general, whenever forces act on an object in opposite directions-the net force is equal to the difference between the two forces.
To calculate the net force, one force is subtracted from the other. therefore, here
325 N is force 1 to the right.
45 N is force 2 to the left.
Force 1 - Force 2 is the net force.
net force= 325N - 45N
net force= 280 N
So the required force is 280 N.
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The net force of the runner would be 280 N.
Hope this helps! Also, if you need help with the other questions regarding this assignment, feel free to check out the study set I made on Quizlet. Thanks and good luck!
Quizlet - "Unit 6: Lesson 2 Newton's First Law QC"
h t t p s : / / q u i z l e t. c o m / 7 3 7 7 5 9 5 5 5 / u n i t - 6 - l e s s o n - 2 - n e w t o n s - f i r s t - l a w - f l a s h - c a r d s / ? n e w
Convert 1.9 kJ into the following units:
a. calories [answer: 450 cal]
b. Joules [answer: 1,900 J]
please show me the work, thank youu
Conevrting 1.9 kilojoule(kJ) into:
a) 1.9 kJ = 450 cal
b) 1.9 kJ = 1900 J
Similar to how kilometers measure distance, a kilojoule is a unit used to measure energy. Some nations continue to utilize the Calories (Cal) system, which was once used to quantify food energy. These are the conversions: 1 kJ = 0.2 Cal.
A calorie is a unit of energy measurement. Typically, the energy content of meals and beverages is determined in terms of calories. You must consume fewer calories each day than your body uses up in order to lose weight. Calories are necessary for human survival. Without energy, the body's cells would die, the heart and lungs would stop pumping, and the organs wouldn't be able to carry out essential life tasks. Through their consumption of food and liquids, people can absorb this energy.
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Ramelteon is a hypnotic agent used in the treatment of insomnia: what is the molecular formula of this compound? enter your answer in form of cxhynzow
Ramelteon is a hypnotic agent used in the treatment of insomnia. The molecular formula of this compound is C16H21NO2.
The molecular formula is the number of elements that are present in a compound. The molecular formula is calculated in terms of the empirical formula since the empirical formula is just the same or a multiple of the molecular formula.
The formula is :
n=M/mass of the empirical formula
Where,
M is the molar mass and n is an integer.
For example, the molecular formula of Caffeine C8H10N4O2 and its empirical formula is C4H5N2O.
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What parts of polypeptide participate in bonds that hold together secondary structure? tertiary structure?
The parts of polypeptide participate in bonds that hold together secondary structure and tertiary Secondary structure shape is supplied via way of means of hydrogen bonds among atoms withinside the polypeptide spine of proteins. Interactions among the aspect chain atoms of the amino acid subunits shape the confirmation.
The Secondary structure shape includes nearby packing of the polypeptide chain into α-helices and β-sheets via way of means of hydrogen bonding among the peptide bond and the significant carbon spine. Tertiary (3D) shape is the form that outcomes from secondary structural folding decided via way of means of interactions among amino acid aspect chains.
Secondary structure outcomes from hydrogen bonds that shape among atoms withinside the polypeptide spine. A hydrogen bond is shaped among a partially bad oxygen atom and a partially effective nitrogen atom.
The tertiary structure is stabilized via way of means of aspect chain purposeful corporations inclusive of numerous interactions, in particular hydrogen bonds, salt bridges, covalent disulfide bonds, and hydrophobic interactions.
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(a) the element with one more proton in its nucleus than a chlorine atom
false assertion because An electron has a negative charge, whereas a proton has a positive charge. The element has one extra proton in its nucleus than a chlorine atom. The charges are opposing yet of equal magnitude.
A proton is what?A proton is a stable subatomic particle with the symbols p, H+, or 1H+ and an electric charge of +1 e. Its mass is 1836 times greater than that of an electron and only slightly less than that of a neutron.
A proton is a stable subatomic particle with the symbols p, H+, or 1H+ and an elementary electric charge of +1 e. Its mass is 1836 times that of an electron and slightly less than that of a neutron.
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what are 3 main ways an object can accelerate
Answer:
There are following three ways in which a object can accelerate....
1...speeding up
2.... slowing down
3... changing direction
hope it help you✌✌✌✌✌
Explanation:
Which of the following chemicals does not occur naturally?
Answer:
Explanation:
O2
A flask weighs 43.50 g when it is empty and 105.50
g when filled with water. when the same flask is
filled to the same volume with another liquid, the
mass is 96.75 g. what is the density of the second
liquid? (the density of water is 1 g/ml.)
The density of the second liquid is 0.4496.
What is density?"Density is the mass per unit volume." Density is known as a scalar quantity. It is denoted by a small d and the symbol for density is given as rho, a Greek symbol. Density is calculated as mass divided by volume.
The first density is
A flask weighs 43.50 g = M1
The mass is 96.75 g = M2
D1 = 1 g/ml
Density 2 = ?
The formula
M1 x D1 = M2 x D2
43.50 g x 1 g/ml = 96.75 g x D2
D2 = 43.50 g x 1 g/ml / 96.75 g = 0.4496.
D2 = 0.4496
Thus, the density of the second liquid is 0.4496.
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The specific heat capacity of an object depends only on the substance from which the object is made. true false
True, the specific heat capacity of an object depends only on the substance from which the object is made.
Specific heat capacity is defined as the amount of heat required to raise the temperature of one gram of a substance by one degree Celsius.
The SI unit of specific heat capacity is joule per kelvin per kilogram.
The specific heat capacity at constant volume is written as,
[tex]C_{V} = (du/dt)_{V}[/tex]
The specific heat capacity at constant pressure is written as,
[tex]C_{P} = (dh/dT)_{P}[/tex]
here, u is the internal energy of system in kJ/kmol and h is the enthalpy of system in kJ/kmol.
For an Ideal gas the relation between heat capacity at constant volume and at constant pressure can be written as ,
[tex]C_{P} - C_{V} = R[/tex]
Specific heat capacity is an intensive property i.e., independent of quantity. No matter how much substance we have, its ability to absorb heat energy at a particular temperature is the same.
So, we can say that the specific heat capacity of an object depends only on the substance from which the object is made and not on its quantity.
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A tetrahedral carbon is ____________ hybridized while a linear carbon is ____________ hybridized.
A tetrahedral carbon is sp3 hybridized while a linear carbon is sp hybridized.
Carbon is a chemical element with the symbol C and atomic number 6. It is a non-metal and is tetravalent. That atom donates four electrons to form a covalent chemical bond. It belongs to group 14 of the periodic table. Carbon makes up only about 0.025% of the Earth's crust.
Carbon is an essential element for all life forms on earth. Carbon uptake and release are part of all plant and animal life, whether these life forms take up carbon to help make food or release carbon as part of respiration. Carbon is constantly moving from place to place. Carbon is also found in fossil fuels such as petroleum (crude oil), coal, and natural gas. Carbon is also found in dead, decaying animals and animal waste soils. Carbon is stored in the biosphere of plants and trees.
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